Fig. 2: 13C-CP-MAS NMR spectra of collagen.
From: Discovery of mammalian collagens I and III within ancient poriferan biopolymer spongin
I standard (black line) and a spongin sample treated with hydrogen peroxide (red line) at a spinning speed of 10 kHz. Asterisks mark spinning sidebands (see also Supplementary Fig. 4). Source data are provided as a Source Data file.
